Debian Security Advisory

DLA-2853-1 ruby2.3 -- LTS security update

Date Reported:
28 Dec 2021
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2021-41817, CVE-2021-41819.
More information:

A cookie prefix spoofing vulnerability in CGI::Cookie.parse and a regular expression denial of service vulnerability (ReDoS) on date parsing methods was discovered in src:ruby2.1, the Ruby interpreter.

For Debian 9 stretch, these problems have been fixed in version 2.3.3-1+deb9u11.

We recommend that you upgrade your ruby2.3 packages.

For the detailed security status of ruby2.3 please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: